.\" $OpenBSD: smtpctl.8,v 1.50 2015/07/27 18:48:05 sobrado Exp $
.\"
.\" Copyright (c) 2006 Pierre-Yves Ritschard <pyr@openbsd.org>
.\" Copyright (c) 2012 Gilles Chehade <gilles@poolp.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: July 27 2015 $
.Dt SMTPCTL 8
.Os
.Sh NAME
.Nm smtpctl ,
.Nm mailq
.Nd control the Simple Mail Transfer Protocol daemon
.Sh SYNOPSIS
.Nm
.Ar command
.Op Ar argument ...
.Nm mailq
.Sh DESCRIPTION
The
.Nm
program controls
.Xr smtpd 8 .
Commands may be abbreviated to the minimum unambiguous prefix; for example,
.Cm sh s
for
.Cm show stats .
.Pp
The
.Nm mailq
command is provided for compatibility with other MTAs
and is simply a shortcut for
.Cm show queue .
.Pp
The following commands are available:
.Bl -tag -width Ds
.It Cm encrypt Op Ar string
Encrypt the password
.Ar string
to a representation suitable for user credentials and print it to the
standard output.
If
.Ar string
is not provided, cleartext passwords are read from standard input.
.Pp
It is advised to avoid providing the password as a parameter as it will be
visible from
.Xr top 1
and
.Xr ps 1
output.
.It Cm log brief
Disable verbose debug logging.
.It Cm log verbose
Enable verbose debug logging.
.It Cm monitor
Display updates of some
.Xr smtpd 8
internal counters in one second intervals.
Each line reports the increment of all counters since the last update,
except for some counters which are always absolute values.
The first line reports the current value of each counter.
The fields are:
.Pp
.Bl -bullet -compact
.It
Current number of active SMTP clients (absolute value).
.It
New SMTP clients.
.It
Disconnected clients.
.It
Current number of envelopes in the queue (absolute value).
.It
Newly enqueued envelopes.
.It
Dequeued envelopes.
.It
Successful deliveries.
.It
Temporary failures.
.It
Permanent failures.
.It
Message loops.
.It
Expired envelopes.
.It
Envelopes removed by the administrator.
.It
Generated bounces.
.El
.It Cm pause envelope Ar envelope-id | message-id
Temporarily suspend scheduling for the envelope with the given ID,
or all envelopes with the given message ID.
.It Cm pause mda
Temporarily stop deliveries to local users.
.It Cm pause mta
Temporarily stop relaying and deliveries to
remote users.
.It Cm pause smtp
Temporarily stop accepting incoming sessions.
.It Cm profile Ar subsystem
Enables real-time profiling of
.Ar subsystem .
Supported subsystems are:
.Pp
.Bl -bullet -compact
.It
queue, to profile cost of queue IO
.It
imsg, to profile cost of event handlers
.El
.It Cm remove Ar envelope-id | message-id
Remove a single envelope, or all envelopes with the same message ID.
.It Cm resume envelope Ar envelope-id | message-id
Resume scheduling for the envelope with the given ID,
or all envelopes with the given message ID.
.It Cm resume mda
Resume deliveries to local users.
.It Cm resume mta
Resume relaying and deliveries to remote users.
.It Cm resume route Ar route-id
Resume routing on disabled route
.Ar route-id .
.It Cm resume smtp
Resume accepting incoming sessions.
.It Cm schedule all
Mark all envelopes as ready for immediate delivery.
.It Cm schedule Ar envelope-id | message-id
Mark a single envelope, or all envelopes with the same message ID,
as ready for immediate delivery.
.It Cm show envelope Ar envelope-id
Display envelope content for the given ID.
.It Cm show hosts
Display the list of known remote MX hosts.
For each of them, it shows the IP address, the canonical hostname,
a reference count, the number of active connections to this host,
and the elapsed time since the last connection.
.It Cm show hoststats
Display status of last delivery for domains that have been active in the
last 4 hours.
It consists of the following fields, separated by a "|":
.Pp
.Bl -bullet -compact
.It
Domain.
.It
.Ux
timestamp of last delivery.
.It
Status of last delivery.
.El
.It Cm show message Ar envelope-id
Display message content for the given ID.
.It Cm show queue
Display information concerning envelopes that are currently in the queue.
Each line of output describes a single envelope.
It consists of the following fields, separated by a "|":
.Pp
.Bl -bullet -compact
.It
Envelope ID.
.It
Address family of the client which enqueued the mail.
.It
Type of delivery: one of "mta", "mda" or "bounce".
.It
Various flags on the envelope.
.It
Sender address (return path).
.It
The original recipient address.
.It
The destination address.
.It
Time of creation.
.It
Time of expiration.
.It
Time of last delivery or relaying attempt.
.It
Number of delivery or relaying attempts.
.It
Current runstate: either "pending" or "inflight" if
.Xr smtpd 8
is running, or "offline" otherwise.
.It
Delay in seconds before the next attempt if pending, or time ellapsed
if currently running.
This field is blank if
.Xr smtpd 8
is not running.
.It
Error string for the last failed delivery or relay attempt.
.El
.It Cm show relays
Display the list of currently active relays and associated connectors.
For each relay, it shows a number of counters and information on its
internal state on a single line.
Then comes the list of connectors
(source addresses to connect from for this relay).
.It Cm show routes
Display status of routes currently known by
.Xr smtpd 8 .
Each line consists of a route number, a source address, a destination
address, a set of flags, the number of connections on this
route, the current penalty level which determines the amount of time
the route is disabled if an error occurs, and the delay before it
gets reactivated.
The following flags are defined:
.Pp
.Bl -tag -width xx -compact
.It D
The route is currently disabled.
.It N
The route is new.
No SMTP session has been established yet.
.It Q
The route as a timeout registered to lower its penalty level and possibly
reactivate or discard it.
.El
.It Cm show stats
Displays runtime statistics concerning
.Xr smtpd 8 .
.It Cm show status
Shows if MTA, MDA and SMTP systems are currently running or paused.
.It Cm stop
Stop the server.
.It Cm trace Ar subsystem
Enables real-time tracing of
.Ar subsystem .
Supported subsystems are:
.Pp
.Bl -bullet -compact
.It
imsg
.It
io
.It
smtp (incoming sessions)
.It
filter
.It
transfer (outgoing sessions)
.It
bounce
.It
scheduler
.It
expand (aliases/virtual/forward expansion)
.It
lookup (user/credentials lookups)
.It
stat
.It
rules (matched by incoming sessions)
.It
mproc
.It
all
.El
.It Cm unprofile Ar subsystem
Disables real-time profiling of
.Ar subsystem .
.It Cm untrace Ar subsystem
Disables real-time tracing of
.Ar subsystem .
.It Cm update table Ar name
For table backends that provide caching, causes
.Xr smtpd 8
to update the cache.
.El
.Pp
When
.Nm smtpd
receives a message, it generates a
.Ar message-id
for the message, and one
.Ar envelope-id
per recipient.
The
.Ar message-id
is a 32-bit random identifier that is guaranteed to be
unique on the host system.
The
.Ar envelope-id
is a 64-bit unique identifier that encodes the
.Ar message-id
in the 32 upper bits and a random envelope identifier
in the 32 lower bits.
.Pp
A command which specifies a
.Ar message-id
applies to all recipients of a message;
a command which specifies an
.Ar envelope-id
applies to a specific recipient of a message.
.Sh FILES
.Bl -tag -width "/var/run/smtpd.sockXXX" -compact
.It Pa /var/run/smtpd.sock
.Ux Ns -domain
socket used for communication with
.Xr smtpd 8 .
.El
.Sh SEE ALSO
.Xr smtpd 8
.Sh HISTORY
The
.Nm
program first appeared in
.Ox 4.6 .
